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WorksheetsEnergy Transformations
Total questions: 49
Worksheet time: 26mins
Photosynthesis goes through two energy transformations. What are the transformations?
radiant
chemical
chemical
radiant
electrical
nuclear
radiant
sound
Electrical → Mechanical → Sound
Which device were the students most likely observing?
The process of changing energy from one form to another.
transmission
transportation
transformation
The law of conservation of energy states that energy can neither be destroyed nor created. According to this law which of these equations is correct?
E=mc2
KE = PE
Energy in = energy out
Energy in = power in
When water falls through a dam and turns a turbine connected to a generator, electricity is produced. The electricity is used to light a home. Which shows the energy transformation?
electrical➡light➡mechanical
chemical➡mechanical➡electrical
mechanical➡chemical➡light
mechanical➡electrical➡light
A skier increases speed while skiing down a hill during a race. Which statements accurately describe the potential and kinetic energy of the skier?
Kinetic energy increases. Potential energy decreases.
Kinetic energy increases. Potential energy stays the same.
Kinetic energy stays the same. Potential energy decreases.
Kinetic energy stays the same. Potential energy increases.
The picture shows a boat that is powered by a rubber band. Which energy transformation occurs in this boat when it sails?
Thermal energy stored in the rubber band is transformed into chemical energy used by the paddles.
Kinetic energy stored in the rubber band is transformed into thermal energy used by the paddles.
Chemical energy stored in the rubber band is transformed into potential energy used by the paddles.
Potential energy stored in the rubber band is transformed into kinetic energy used by the paddles.
A lamp is plugged into a wall outlet. Which sentence explains what happens to the electric energy as the light shines?
The electric energy gets used up.
The electric energy changes into light and heat energy and is destroyed.
The electric energy is created again after it produces light and heat energy.
The electric energy changes into light and heat energy and is not destroyed.
A rock falls off a cliff that is 100m above the ocean. If no air resistance is present, during the fall there will be a decrease in the rock's -
gravitational potential energy
total mechanical energy
kinetic energy
momentum
Which answer choice correctly describes the roller coaster's kinetic and potential energy?
The coaster has more potential energy at point 3 than at point 4.
The coaster has more kinetic energy at point 3 than point 2.
The potential and kinetic energy of the coaster are equal at point 4.
The potential and kinetic energy of the coaster are the greatest at point 1.
A pendulum is given potential energy by being pulled up to location W. At which location does the pendulum have maximum kinetic energy?
Location W
Location X
Location Y
Location Z
The diagram shows how a steam engine in a train works. Which description of the energy conversions in the process is correct?
The chemical energy in the coal is converted to thermal energy, which is then converted to mechanical energy.
The mechanical energy in the coal is converted to electrical energy, which is then converted to thermal energy.
The electrical energy in the coal is converted to mechanical energy, which is then converted to thermal energy.
The thermal energy in the coal is converted to electrical energy, which is then converted to mechanical energy.
Students built a simple circuit connecting a battery to a light bulb. Which energy transformations happen when the students close the circuit and the bulb lights up?
Chemical to radiant to electrical
Electrical to chemical to radiant
Chemical to electrical to radiant
Radiant to electrical to chemical
A teacher heats up their lunch in the microwave. What energy transformations occur between the microwave and the food?
Electrical to light to chemical
Chemical to thermal to light
Electrical to electromagnetic to thermal
Electrical to electromagnetic to chemical
Which statement best describes the energy of a roller coaster as it slows down while traveling to the top of the coaster?
The coaster cart gains both kinetic and potential energy.
The coaster cart gains kinetic energy and loses potential energy.
The coaster cart loses kinetic energy and gains potential energy.
The coaster cart loses both kinetic and potential energy.
The bus takes you to school.
Chemical (gasoline) -> Mechanical (movement of bus)
Electrical (gasoline) -> Mechanical (movement of bus)
Thermal (gasoline) -> electrical (movement of bus)
A lamp is plugged into a wall outlet. Which sentence explains what happens to the electric energy as the light shines?
The electric energy -> radiant and heat energy
mechanical energy -> radiant energy
Radiant energy -> chemical energy
A student heats up their soup on the stove. What energy transformations occur between the microwave and the food?
Electrical to light to chemical
Chemical to thermal to light
Electrical to thermal
A hair dryer goes through three energy transformations. What are they?
electrical ->
thermal ->
mechanical
mechanical ->
thermal ->
electrical
mechanical ->
electrical ->
thermal
A student sees the sunshine through the window.
Nuclear -> Radiant
Thermal -> electrical
A student sees the sunshine through the window.
Nuclear -> Radiant
Thermal -> electrical
A swing has potential energy if
it is sitting still
moving at a constant speed
accelerating at a fast pace
using multiple units of kinetic energy
What energy transformations take place when a battery operated radio is in use?
electrical to chemical to sound
thermal to nuclear to electrical
chemical to electrical to sound
chemical to sound to thermal
According to the Law of Conservation of Energy, energy cannot be ______ or _______
destroyed, determined
created, nuclear
destroyed, remade
created,destroyed
What type of energy is represented in the picture?
potential
chemical
thermal
mechanical
A lamp that plugs into a wall socket draws energy, which flows through a thin wire in the bulb, causing it to heat up until it glows. What energy transformations are taking place?
Chemical → light → electrical
Mechanical → sound → light
Thermal → solar → electrical
Electrical → thermal → light
An electric pencil sharpener uses electricity to make its motor spin. The pencil sharpener also makes noise and heats up. Which observation of the pencil sharpener demonstrates the law of conservation of energy?
The amount of electrical energy used equals the total amount of mechanical, sound, and thermal energy produced.
The amount of energy used by the electric pencil sharpener is greater than an electric lamp.
The electric pencil sharpener only uses energy when it is being used to sharpen a pencil.
The electric pencil sharpener is easier to use than the older version that was cranked by hand.
Turning the handle makes a current that causes the light bulb to glow. What are the energy transformations that happen in this hand generator?
Thermal → solar → light
Mechanical → electrical → light
Electrical → mechanical → light
Solar → light → electrical
When energy enters a system and then comes out of the system later, the law of conservation of energy states that–
some of the energy that entered the system will remain in the system.
the energy will always create a change in the properties of the parts of the system.
the form of energy that comes out of the system must be the same form that entered.
the amount of energy coming out of the system must equal the energy that entered the system.
In which of the following scenarios would this energy transformation be observed?
chemical → light → heat
Plucking a guitar string
Lighting a match
Turning on a fan
Starting a car
The law of conservation of energy states ___.
electrical energy can be transformed into other forms
energy can be created and destroyed
energy is never created nor destroyed
what goes up must come down
During energy transformations, energy is never ___.
released as heat
used to increase an object's potential energy
created or destroyed
completely transformed
A baseball is hit into the air with a bat. When does baseball have the greatest gravitational potential energy?
when it hits the ground
when it reaches its highest point
when it leaves the bat
when the mechanical and kinetic energies of the baseball are equal
___ is energy stored by things that stretch or compress.
Gravitational potential
Elastic kinetic energy
Chemical kinetic energy
Elastic potential energy
What type of energy is stored in a battery?
electrical
thermal
radiant
chemical
Which energy transformation occurs in a toaster?
electrical → thermal
chemical → thermal
nuclear → electrical
thermal → electrical
A battery converts what type of energy to another?
electrical → thermal
chemical → electrical
kinetic → nuclear
light → heat
Energy transformations occur when ___.
a chemical reaction takes place
energy changes from one form to another
energy is created through conduction
two forces slide together that are touching
Which items would have this energy transformation: chemical → mechanical
a candle burning
eating a big breakfast before a race
a ball bouncing
using a hairdryer
